Hate to be THAT guy but of all the Halo releases, are there really people interested in celebrating the anniversary of Halo: ODST?
IMHO, this was by far the weakest title in the Halo pantheon. And it's well documented that ODST was just a side release on the Halo 3 engine to help fulfill Bungie's obligation to Microsoft to ship 2 more titles (this & Halo: Reach) before being cut loose.